. Bulletin of the Natural History Museum Zoology. 6CH W -fcfcjf 40-1 80 70 h\l- '**&*<:* Fig. 130 Portlandia minuta. Lateral views of shells from the left and right sides, detail of the hinge-plate of a left valve and the dorsal view of a shell. Specimens from Sta. 203, Cape Basin. (Scale = | mm). Thereafter it makes a single loop to the right side of the body. A small amount of food material was observed in parts of the left digestive diverticulum. The kidneys are small. Gonads are present in specimens larger than mm. The testes occur dorsally, ventrally and internally to the d
. Bulletin of the Natural History Museum Zoology. 6CH W -fcfcjf 40-1 80 70 h\l- '**&*<:* Fig. 130 Portlandia minuta. Lateral views of shells from the left and right sides, detail of the hinge-plate of a left valve and the dorsal view of a shell. Specimens from Sta. 203, Cape Basin. (Scale = | mm). Thereafter it makes a single loop to the right side of the body. A small amount of food material was observed in parts of the left digestive diverticulum. The kidneys are small. Gonads are present in specimens larger than mm. The testes occur dorsally, ventrally and internally to the digestive diverticula; with posterior dorsal and lateral extensions. In the course of growth, the valves become more inflated and more rostrate but there is little change in the height/ length or posterior umbonal length/ total length ratios (Fig.| 131). Hydroids were present on one individual and these! covered the dorsal and posterior shell margins. 60- 40 PL\TL Length (mm) Fig. 131 Portlandia fora. Variation in ratios of height H/L, width W/L and postero-umbonal length PT/TL to length against length of a subsample taken from Sta. 203, Cape Basin. byssal gland in the heel with a relatively large blood space surrounding it. The nervous system is well-developed with large 'club'-shaped visceral and cerebral ganglia and large, round, pedal ganglia with associated large statocysts dorsal to them. The stomach and style sac are large. From the style sac the hind gut penetrates the foot for a short distance before turning dorsally to parallel the posterior edge of the Fig. 132 Portlandia fora. Lateral view from the right side of the internal morphology of a specimen from Sta. 203, Cape Basin. (Scale = mm). For identification of parts see Fig. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Natural
Size: 1828px × 1366px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bhlconsortium, bookcentury1900, bookcollectionbiodiversity, bookl
